North Ridge Pumps MT Installation guide

Pump Type
:
Pump Serial No
:
Max. Pressure
:
Bar
Capacity
:
m³/h
Motor Power
:
kW
Pump Speed
:
rpm
Project Number
:
Tag No.
:
MT, MG & MFIG Magnetically
Coupled Gear Pump Range
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
X-Cel House, Chrysalis Way, Langley Bridge, Nottinghamshire, NG16 3RY
Tel: [phone] | Email: [email protected] | Website: www.northridgepumps.com
User Operation & Maintenance
Manual

GENERAL USAGE INSTRUCTIONS.................................................................................................................. 2
SAFETY INSTRUCTIONS................................................................................................................................. 2
A- OVERVIEW............................................................................................................................................ 3
A1- Description of Pumps and Working Principle ................................................................................ 3
A2 –Aim of Use and Fields of Application ........................................................................................... 3
A3 –Coding System of Pumps.............................................................................................................. 4
A4- Technical Specification................................................................................................................... 4
A5- Pump Models ................................................................................................................................. 4
B- OPENING PACKAGE, HANDLING AND STORING................................................................................... 5
B1- Opening Package............................................................................................................................ 5
B2- Handling ......................................................................................................................................... 5
B3- Forwarding ..................................................................................................................................... 5
B4- Storing ............................................................................................................................................ 6
C- COMMISSIONING ................................................................................................................................. 6
C1- Accepting / Allowing ...................................................................................................................... 6
D- INSTALLATION...................................................................................................................................... 6
D1- Bare Shaft Ended Pump ................................................................................................................. 6
D2- Assembly Preparations .................................................................................................................. 7
D3- Assembly Location ......................................................................................................................... 7
D4- Coupling Adjusts ............................................................................................................................ 8
D5- Pipe Lines ....................................................................................................................................... 9
E- Starting and Stopping......................................................................................................................... 13
E1- Oil Check....................................................................................................................................... 13
E2- Rotation Direction Check ............................................................................................................. 13
E3- Starting Pump............................................................................................................................... 13
E4- Stopping the Pump....................................................................................................................... 14
E5- Checks During Operating.............................................................................................................. 14
F- DISASSEMBLING, REPAIRING AND REASSEMBLING ........................................................................... 14
F1- Disassembling Pump..................................................................................................................... 14
F2- Repairing Pump ............................................................................................................................ 15
F3- Reassembling Pump ..................................................................................................................... 15
F4- Seals.............................................................................................................................................. 15
F5- Flange Positions............................................................................................................................ 15
G- SECTION VIEW DRAWINGS ................................................................................................................ 16
H- MALFUNCTIONS, POSSIBLE CAUSES AND FIXING METHODS ............................................................ 17
I- PUMP DIMENSIONS ............................................................................................................................ 18
J- SAFETY COVERS................................................................................................................................... 18
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488

GENERAL USAGE INSTRUCTIONS
SAFETY INSTRUCTIONS
- Any stress, contractile and/or weight Should Not be transferred to pump.
- Before approaching pump system, Always make sure to cut off all electrical connections and be aware not to
let any accidental short circuits occur.
- Never insert any objects in any holes or empty spaces.
- Never walk on top of pump and/or piping system.
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
The aim of this manual is to inform user about the following;
- Assembly and maintenance of Pump.
- Starting, operating and stopping methods.
- This handbook should be kept where qualified operators and experienced maintenance
staff can find with ease.
- Maintenance staff should be experienced and well acknowledge of safety standards.
- To avoid improper use of pumps, the instructionsgiven in this handbook should be studied carefully and be
applied in every step of installation and operation.
- User is responsible for control and installation, ensuring this is performed by qualified personnel who have
studied this handbook carefully.
- Pump should only be used within conditions stated in purchase order. This is due to selection of pump
materials and tests been done according to operating conditions mentioned at time of enquiry.
- Pleasecontact North Ridge Pumps in case of use of pump in operating conditions that varyfrom what has
mentioned at time of enquiry. Unless written confirmation is received, North Ridge will not accept any
responsibility of damages caused by using pump differently to that mentioned at the time of enquiry.
- If delivered pump will be stored for some time before use, pump should be stored in clean and dry place
where ambient temperature does not vary. Very high and low temperatures may cause major damage to the
pump.
- North Ridge Pumps will not guarantee any maintenance, repair or changes performed by end user
or any unauthorized person.
- This handbook does not include information regarding safety instructions that should be followed at actual
place of operation falling outside the scope of this manual.
follow instructions below to avoid physical and/or property losses.
- Run pump Only according to stated operating conditions.
- Electrical connections of motor and auxiliaries Should be done by qualified personal and according to local
terms and conditions.
- Pump system Should Not be approached until all rotating parts have stopped.
- Any action taken on pump system Should Always be done by a minimum of two personnel.
- Anyone approaching pump system Should Always be dressed with required safety gear(s).
- Never approach pump while it is hot.
-Never touch pumps and pipes with 80 oC (176 oF) temperature or higher. User should take all
necessary precautions.
- Never approach pump and connected pipes while under pressure.
- After finishing all work on pump, all guards removedShould be reinstalled.
2

A- OVERVIEW
A1- Description of Pumps and Working Principle
B C
A2 –Aim of Use and Fields of Application
Pumps in YMG series are used for transferring viscose and semi-viscose liquids with no leakage at all.
Mostly preferred for applications where air contact with liquid is unwanted. Mainly used for below
applications:
• Isocyanates • Sodium Hydroxide
• Adhesives • Volatile Organic Chemicals
• Hazardous Chemicals • LPG and Ammonia
• Reactive Chemicals • Refineries
• Chemical and Polymer Plants • Paper Mills
• Pipelines • Epoxy Resins
Figure 1. Working Principle
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
X-Cel House, Chrysalis Way, Langley Bridge, Nottinghamshire, NG16 3RY
Tel: [phone] | Email: [email protected] | Website: www.northridgepumps.com
The M Range of pumps have a horizontal shaft, withh a port position at 90oor 180o.The idler gear
are placedeccentrically towards pump shaft.
There are two rotating gears; Rotor and Idler Gear. Idler gear is placed in an eccentric position
to Rotor and has a lower number of teeth. Partsextrudefrom the cover in the shape of a Crescent
which acts as a seal,preventing liquids from the suction and discharge areas from mixing together.
A - When the pump shaft is rotated, volume within
suction port increases and creates a vacuum. This
causes liquid to enter the suction port.
B - Liquid flows forward, and the Crescent divides
the liquid and acts as a seal by preventing liquid from
flowing back to suction port. The Design of Rotor and A B
Idler gears provide volumetric flow forming locked pockets
of fluid.
C - The discharge port is filled during the delivery
process. Arrows show the direction of rotation and the
flow of liquid.

A3 –Coding System of Pumps
Pump Con. Type (Horizontal Flanged 180o)
Suction/Discharge Port Diameter (DN)
A4- Technical Specification
Proof)
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
M F 2"
Pump Type (North Ridge Magnetic Coupled)
Pump Type ( North Ridge ) Magnetic Coupled
Pump Connection Type (Flanged 90o)
Suction/Discharge Port Diameter (DN)
MG F 2"
Speed : up to 1500 rpm (Max.) (Max. 500 rpm for 2” pumps and bigger)
Suction/Discharge Flanges : DN 32 DN 100 mm TS ISO 7005-2 , DIN 2533/PN 16
Operating Temperature : -30 250 oC
Ambient Temperature (Max.) : 40 oC
Casing Pressure (Max.) : 15 Bar
Transferrable Liquids : See A2
Protection Class : IP 55
Electrical Connection : 400V –50Hz, 3 Phase
Motor Options (on demand) : Special Voltage, Frequency and ATEX(Ex.

B- OPENING PACKAGE, HANDLING AND STORING
B1- Opening Package
B2- Handling
B2.1- General Warnings
2b or Figure 2c.
B3- Forwarding
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
X-Cel House, Chrysalis Way, Langley Bridge, Nottinghamshire, NG16 3RY
Tel: [phone] | Email: [email protected] | Website: www.northridgepumps.com
•Check package for any damage caused to product.
•Check if all products noted in Delivery Note / Packing List have arrived. In case of items
missing, you are kindly requested to immediately inform North Ridge Pumps.
•Wear gloves, safety shoes and helmet.
• Pallets or boxes should be handled via forklift, crane or hoists.
B2.2- Lifting Operation
• Examine points below before lifting/handling pump system:
- Total weight and centre of gravity, - External dimensions, - Lifting Points.
• Lifting capacity should be suitable for pump or pump system.
• Pump or Pump System should always be handled horizontally.
• Standing near or beside lifted load is strictly prohibited.
•To avoid any damage to pump or pump system, handling should be done as shown in Figure 2a, Figure
• Pump will be placed on pallet or box according to volume and weight.
• Freight company should deliver pump without damage
• Delivered pump and accessories should be checked for damage during forwarding.
Figure 2a. Bare Shaft Figure 2b.Pump with Motor Figure 2c. Pump System
Pump

B4- Storing
C- COMMISSIONING
C1- Accepting / Allowing
D- INSTALLATION
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
• If pump will not be used immediately, pump should be stored in clean,dry place where
ambiant temperature does not vary.
• To avoid moisture in pumps equipped with externally lubricated bearings, extra greaseshould be
applied.
• All required precautions should be undertaken to protect pump from dust,dirt and foreign particles.
• Rotate pump shaft by hand (e.g. once a month) to avoid pitting on the surface of bearings and
pump jamming.
• Check delivered pump for damage.
• Check model name and type information on label with information on PO
• In case of damag,a written report should be presented firstly to Freight Company then to North Ridge
Pumps
• When contacting North Ridge Pumps regarding a pump, the Serial Number will always be required
which can be found printed on the pump nameplate.
Installation should be done according to EN 60204-1 Standards.
Installing and adjustment of pump should only be done by qualified personnel. Otherwise, major
breakdowns may occur due to the wrong installation as shown in Figure 3. Such breakdowns are
not covered by guarantee.
D1- Bare Shaft Pump
• If bareshaft pump is purchased, base plate/chassis should be rigid and manufactured to prevent any
vibration and deformation.
• Correct Coupling and motor/gearmotor should be obtained.
The following should be taken in to consideration when making a selection of
motor/gearmotor:
−selecting pump speed that provides required liquid transfer capacity
−Pump pressure head
−Required power source (frequency, voltage … etc.)
−Motor Type (TEFC, Ex. Proof … etc.), Gearbox type
−Assembly of motor/gearmotor (foot mounted, horizontal, vertical … etc.)

D2- Assembly Preparations
ports.
D3- Assembly Location
Base should handle 100 N/mm2Force per each m2.
Figure 3. Concrete Base, Chassis and Anchorage
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
Before assembling system to production lines, ensure the following:
• Remove cover onboth ports and carefully clean all sides of both suction and discharge
• If pump has been temporarily stored, all lubricants (grease/oil) on bearings should be removed,
carefully cleaned and lubricated again.
( Attention: this does not apply on pumpslubricated with lifetime grease)
• Pump should work in a well ventilated environment and where there is no risk of freezing or
explosion.
• Sufficient space should be available on all sides of pump for convenience to perform maintenance.
• Suction line connected to pump should be as short as possible.
D3.1- Base Plate / Chassis
• Assembling of pump should be handled carefully. Incorrect assembly will cause pump parts to
wear sooner and cause pump breakdown.
• Pump base should be heavy enough to absorb vibrations and rigid enough to prevent any torsion and
damage during adjustments of components. Before mounting pump to concrete base, base should
have hardened (completed setting time). Upper surface of concrete base should be level
Minimum handling load of base should be at least 10 kg / m2.
D3.2- Mounting Base
• Place pump system on top of concrete base. Then check level of pump system via spirit level.
• Slightly turn studs in anchorage.
• Adjust coupling as shown in D4.
• Keep turning studs until linearity is accomplished.

a) Angular failure
b) Parallel sliding failure
Figure 4a. Wrong Figure 4b. Right
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
D4- Coupling Adjustment
a = Space between two sides of coupling.
e = Distance between to axis
e = 0 (is always required)
a value should be within tolerances available for each type of coupling.
• The most important factor required for a pump system to operate without issue is ensuring correct
adjustment is made to the coupling. Incorrectly adjusted couplings are the usual cause for many issues
such as vibration, noise, bearing heating, overload and many other problems.
• Elastic couplingsshould not be considered as self calibrating to adjust for non calibration adjustment.
• “Coupling adjustment” is ensuring theaxisof both pump and driver are in line. When ordering
pumps, all required coupling adjustments will be performed at our factory. However, adjustments can
be damaged easily during forwarding, handling, Installing and piping. Therefore, despite our
adjustmentsit is very important to readjust coupling after installation.
• To adjust coupling you will need two feeler gaugeswith straight sides no less than 10 cm (e.g. steel
ruler, tolerance gauge) and a caliper. For sensitive adjustment special equipment should be used.
• During coupling adjustment, two possible failures may occur;
• To check for angular failure, measure gap distance between two couplingsin vertical and
horizontal positions. Distance for these for points should be equal.
• Adjusting failures may occur in horizontal and/or in vertical planes. Vertical adjusting failures can be
corrected by placing thin metal sheets below feet of pump or motor/gearmotor. Horizontal
adjustment failures can be corrected by sliding pump or motor/gearmotor; though taking advantage
of spaces in connection holes. See Figure 5a, 5b, 5c, and 5d respectively for correcting coupling adjusts.
Figure 5a. Horizontal Angular Adjustment Figure 5b. Vertical Angular Adjustment
• To check parallel sliding failure, hold one metal piece with straight sides on one coupling parallel to
axisand hold the other piece opposite on the other coupling half. Check for gaps. Metal piece should
touch on its straight side on both parts of coupling at the same time. Check in horizontal and vertical
positions. (Figure 4)

D5- Pipe Lines
D5.1- Overview
• Any remaining welding spatter and/or any kind of hard particles inside pipe lines may damage the
pump. Therefore, to avoid such particles from entering the pump, suction and discharge ports should be
protected and closed with proper gaskets. After making assembly of pipes, all remaining particles in
tubes should be removed, cleaned and reassembled after painting.
CHECK VALVE
VALVE
DISCHARGE LINE
LINE SUPPORTS VALVE
SUCTION LINE
PUMP
Figure 6. Pipeline supporting points
Figure 5c. Horizontal Parallel Sliding Failure Figure 5d. Vertical Parallel Sliding Failure
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
• Never consider pump as a supporter for pipe lines.
• Pipe lines should be supported from all points close to pump (See Figure 6). After pipingassembly
has been made, check if suction and discharge pipelines apply any tension to flanges of the pump; by
loosening bolts.
• Diameter of all tubes, pipes, fittings and accessories used should be larger or at least equal to port
diameter of pump. Never use pipes or accessories with a diameter smaller than the port diameter
of a pump. In general, speed of flow should not exceed 2 m/s in suction line and 3 m/s in discharge line.
High speed causes major pressure loss which generates cavitation conditions in the suction line and
high friction pressure in discharge line.
• It is a must to use connecting parts that can absorb and avoid transmission of external forces caused
by intense vibration and/or thermal expansion when transferring hot liquids.

pockets to occur.
as possible to the pump.
• If discharge line is quite long, then a check valve should be installed to protect the pump from fluid
pulses and to avoid if from flowing back in the opposite direction.
Figure 7. Avoid this design
Figure 8. If necessary, use horizontal elbows instead
of vertical ones as shown.
Figure 9. Proper pipe inclination should be applied
in order to avoid forming of air pockets.
Figure 10. This design should be preferred to
bring liquid closer to the pump
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
D5.2- Suction Line
• Suction pipes should be fitted tightly and designed in a way that will not allow any air
• In order to reduce pressure losses caused by friction,suction distance should be shortened along
with avoiding sharp elbows and sudden changes in direction of pipelines; as much as possible.
D5.3- Discharge Line
• In order to adjust capacity and pressure, a control valve should be assembled on discharge line as close
D5.4- Pressure Relief Valve (Bypass)
D5.4.1- Function of Bypass
The main purpose of pressure relief valve (Bypass) is to protect the pump and driver from any
damage which might be caused due to high pressure. This mainly happens because of a blocked
discharge line.
The working according principles of positive displacement pumps, mean inner parts might face
overload and even break when a blocked discharge line is encountered. A Bypass valve can be placed
on the pump directly and externally on pipelines. Regardless of its location,the working principle will
remain the same.

7 65 4 3 21
D5.4.2- Circuit Bypass
Circuit bypass should be used in case of pump cover being jacketed and pressure relief valve is required
CIRCUIT BYPASS
DISCHARGE LINE
SUCTION LINE
HOT WATER / STEAM DISCHARGE
INLET AND OUTLET
D5.5- Electrical Connections
• Electrical motors should be manufactured according EN 60034-1.
• Minimal protection class of motor casing and control systems used within pump group should be
• Electrical connections should be made by qualified electricians only. Applicable national regulations
and instructions of motor manufacturer should be applied.
• All protection precautions shown under title of “Safety Instruction” should be applied. All
power connections should be discontinued before starting any work.
1 –Bypass
5 –Bypass Head
2 –Bypass Valve
6 –Bypass Adjusting Screw
3 –Spring
7 –Screw Cover
4 –Bypass Washer
Figure 11. Bypass
Figure 12. Circuit Bypass
Table 2.
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
according to standards EN 60529 IP 55. However, during selection of protection class of motor and
electrical connections, working and environmental conditions should be taken in to consideration.
• All eletrical cable routing should be done in a way that avoids contact with pipelines, motor casings
and pump.
(See Figure 12). In this way, capacity and pressure will be under control and pump will be protected. Our
circuit bypass can be provided as jacketed and unjacketed.

• Before making electrical connections, check rotor’s capability to rotate smoothly by rotating it by
hand.
• Electrical connections varies according to motor power, power source and connection type. Required
bridge connections in terminal box are as shown in Table 3 and in Figure 13a, 13b, and 13c.
Motor Power
PN ≤ 4 kW
PN > 4 kW
Power Source
3 P1N1PE ~ 400 V
3 P1N1PE ~ 400 V
Connection Type
Y –Connection (13b)
Δ –Connection (13a)
Y / Δ - start
Not Applicable
Remove Bridges (13c)
Table 3.
Figure 13a. Δ- connection Figure 13b. Y –connection Figure 13c. Y / Δ- connection
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
• Values of voltage, frequency and phase given on label of motor should be compared with values of
available.
• In order to protect electrical motors from overload, circuit breakers and/or fuses should be used.
Selection of circuit breakers and fuses should according to exact electrical load current given on motor
label.
• Electrical connections must be made in accordance with local electrical coding and the earthing
connection must not be forgotten.
• Connection schematic of the motor can be found in the motor terminal box or manual.
D5.6- Final Checks
• After applying all processes above, coupling adjustments should be rechecked and (if necessary)
corrected according to instructions in Section D4. To be sure that the pump rotor will work as
required, rotor should be rotated by hand several times. After pump system should be started and once
operating temperature has been reached, pump should be stopped and thin metal sheets should be
placed under motor feet. After that, a final coupling adjustment should be made. It is highly
recommended to make the last coupling adjustment while at operating temperature.
• Pump system should never be operated without placing safety covers back to original positions.
Following this safety rule is a must.

E- Starting and Stopping
E1- Oil Check
• Bearings lubricated with liquid oil should be refilled with up to level shown on oil indicator.
E2- Rotation Direction Check
E3- Starting Pump
Figure 14. CW/CCW Rotation Directions of Shaft
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
• Pumps equipped with grease lubricated bearings are filled with grease to operate pump safely for at
least one year after dispatch. Before starting pump, bearing should be checked for
foreign particles which may appear during forwarding. In case any dirt or foreign particles are found,
bearings should bey cleaned and refilled with grease. If pump has been stored for over 6 months,
then bearings should be refilled with grease.
• North Ridge Gear pumps rotate clockwise when observed from coupling side. This direction is
demonstrated with an arrow label placed on pump. By running for a very short period, pump rotation
direction should be checked, ensuring it follows the arrow.
• North Ridge Pumps can be operated in reverse. If bypass is installed, direction of bypass should be
reversed if pump is to operate in reverse. (See Figure 14)
• Open all valves on pipelines and ensure there are no solids. Fill Pump with medium.
• Make sure all safety devices are fitted correctly, all moving equipment is covered
and protective coversare in place before starting,to avoid any physical injuries.
• To check if the rotation direction is correct, start the pump for a few seconds and check against
arrow on pump cover.
• Start the pump and check speed and percentage of liquid flow. If not as required, stop the pump and
refer to troubleshooting guide.
• Pump is not delivering any of the liquid.
• Check capacity, pressure and temperature.
If any of the above problems are experienced while pump is running at nominal speed, pump
should be stopped immediately and worked on until resolved.

E4- Stopping the Pump
E5- Checks During Operating
F- DISASSEMBLING, REPAIRING AND REASSEMBLING
• Always remove all electrical connections before approaching the pump and take all necessary
precautions to avoid running the pump accidently.
• Strictly follow all instructions given in “Safety Instructions” section.
F1- Disassembling Pump
• Unscrew Luck nut on pump shaft. Remove washer and spacer ring. Remove internal circlip which
holds ball bearings in place.
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
• Pump is not supplying enoughliquid.
• Motor is overloaded.
• Vibration
• Pump is noisy.
• Bearings are over heating.
• Stop the motor. Wait until all pump parts have stopped rotating.
• Close suction valve and all auxiliary pipelines (if any) ifpump will not be ran for a long period
of time. If the pump will not be used for a long time and/or if there is risk of liquid freezing , then
pump should be completely emptied via unloading plugs and all required precautions be taken to avoid
freezing.
• Check noise level, vibration and pump heat on regular basis.
• Check flow and discharge pressure on regular basis.
• All valves on auxiliary systems should be open.
• Pump magnetic coupling does not require any maintenance. Any leakage will be due to facial O-Rings,
which will require checking and replacing.
• Check elastic part(s) of coupling on a periodic basis. Renew all damaged parts.
•Check electrical current of motor frequently. Detecting higher consumption of Amps indicates jamming
or friction inside the pump.
• Close valve on suction and discharge lines. Empty liquid from pump by opening cover.
• Remove all protection covers on coupling and shaft.
• Detach pump by disconnecting suction and discharge flanges along with auxiliary pipelines.
• Detach pump completely by disconnecting it from motor/gearmotor and from chassis.
• Pump bracket and adaptor should be separated with care. Thus, magnetic coupling will be
unassembled in two pieces.
• Remove pump shaft and group parts assembled from pump bracket.
• Take off pump cover. If there is any wear to rotor gear, remove { X } . Inner side of magnetic coupling
will appear. Clean all coupling parts completely and free rotor gear by releasing conical lock.

F2- Repairing Pump
pressure.
F3- Reassembling Pump
• During reassembly, make sure that O-Rings have been placed correctly, not squashed or stuck.
• Place pump on base plate / chassis, mount driver, and then connect suction and discharge pipelines.
F4- Seals
F4.1- Magnetic Coupling
• Sealing will be performed using magnetic coupling.
F5- Flange Positions
Figure 15. Flange Positions
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
• Check all surfaces in contact with the liquid.
• All parts damaged by wear should be replaced with new ones to avoid losses in flow rate and
• All assembly instructions given in Section F1 should be repeated in reverse order. See attached
assembly section view drawing.
• Apply proper sealing material (i.e. graphite, silicone) on contact faces and bolts before
reassembling. Use lubricating oil in case mentioned materials are not available.
• Do not use removed gaskets. Use new O-Rings and gaskets with the same dimensions.
• To assemble,place ball bearing in bracket. Assemble rotor gear with pump shaft to adaptor. From
other side, place coupling on shaft and fasten with conical lock. Pay attention during assembly to spacing
between rotor frontal surface and cover inner surface. Place O-Ring oncoupling { X }, then
assemble { X } to adaptor.
•Assemble shaft group to bracket and then fasten with lock nut. Pay attention not to trap fingers when
assembling adaptor to bracket (magnetic field creates strong forces).
• In our Internal Eccentric Gear Pump Series, the casing can take eight different positions, which
provides high flexibilty across pump applications.
• Flange direction is adjusted on demand.

No
Parça Adı
Adet
1
Rotor Shaft
1
2
Rotor Gear
1
3
Driving Shaft
1
4
Flange
1
5
Adapter
1
6
Bracket
1
7
Bracket Bushing
1
8
Coupling Bushing
1
9
Spacer for Bearing
1
10
Spacer
1
11
Mini Taper Lock
1
12
SiC Spacer
4
13
Magnetic Coupling
1
14
Lock Nut
1
15
Lock Washer
1
16
Internal Circlip
1
17
Bearing
2
Table 4.
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
X-Cel House, Chrysalis Way, Langley Bridge, Nottinghamshire, NG16 3RY
Tel: [phone] | Email: [email protected] | Website: www.northridgepumps.com
G- SECTION VIEW DRAWINGS

H- MALFUNCTIONS, POSSIBLE CAUSES AND FIXING METHODS
Malfunction
Possible Causes
Fixing Methods
Wrong rotation direction
Reverse rotation direction
Insufficient
Capacity and/or
Pressure
Check valve jammed
Clean check valve
Air leakage
Check and seal suction line.
High NPSH –Net Positive Suction Head
Shorten and/or enlarge suction line diameter.
Reduce manometric suction head
Pump is worn
Check rotor gear spacing. Decrease gap by
removing washers if necessary
Safety valve / Relief valve (Bypass)
activates early or never closes
Adjust activating pressure,
Check valve mechanism
Pump make
noise
Cavitation –manometric suction head is
very high
Shorten and/or enlarge suction line diameter.
Reduce manometric suction head. Check
filters / drainers on suction line.
Rotor / gear damage
Check gears and change if necessary
Correct using washers and wedges
Increase pressure on spring or change if
necessary
Table 5.
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488
Fill suction line manually and remove all air
Air pockets in suction line
Check valve jammed Clean check valve
Pump is not
delivering
liquid while
working
(No Flow) Pump drawing air (sealing hasn’t be
made appropriately) air sucked through
suction line.
Check and provide sealing to suction line.
Incorre alignment of Pump / driving
shaft
Safety valve vibrating
(Table 5).
Possible causes and fixing methods for malfunctions which may occur during operation of our
magnetically driven gear pumps.

I- PUMP DIMENSIONS
All dimensions are in mm - millimeter. Flanges are PN 16.
J- SAFETY COVERS
SAFETY COVERS
North Ridge Pumps Registered in England and Wales 03652700.
Registered Office: 12 Bridgford Road, West Bridgford, Nottingham, NG2 6AB . VAT No. GB324963488